For now i need to join in a single and large MPG file......... i try to use latest Avidemux whit "Copy" setted for video and audio but it's very slowly, about 1 hours and 30 minutes !!

I have also tryed to use "COPY /B xxx4.MPG + ecc. ecc. full.MPG" from prompt of dos....... it's working but after that the full.MPG appears corrupted and it's been reported whit wrong duration (i thinks it's not been indexing correctly)!

After i obtain a correct MPG file...... i need to reopened it...... cutting some parts....... and after that i need to converting it to x264 or xvid...... for that i can use xvid4psp (or you can suggest better programs ?), but this is another step
For now help me to join this five mpeg file

Yeah... i have used Avidemux all this time... only for cutting this parts from full.mpeg about 40 minutes!!!

Now i need only to choose another SIMPLY programs from obtain a MP4/x264 files..... i know Xvid4PSP and i have started a conversion but i thinks i cannot have set all correctly and i thinks i obtain a SHITTY output file.
You can suggest to me another solution ?? You thinks i can use directly Avidemux for convert this to x264 ?? I need to obtain a file executable from all stand alone player..... i need 4 example to obtain a file using a lower profile than High@4.0 (all file i played it's high@3.1), can you suggest to me how i can use ? I'm not expert in convertion setup

*EDIT*
Ah.. because to obtain cutted.mpeg i chose to obtain full.mpg: whit full.mpeg i can make a DVD whit dvdstyler and this cutted.mpeg it's been converted and posted on youtube or my facebook page.....

Sorry for double reply.... but i have used again XVID4PSP for rencode the cutted.MPG file!!

This time i obtain a better file....... about 250MB whit bitrate about 1000Kb/s........ great quality!!! but i have notify the Audio/video tracks goes OUT OF SYNC!!!!!

It's unbelievable!!! i spent 5 hours and i obtain nothing...................

*EDIT*
Now stay to retry again to reconde using Avidemux......... i need to wait again about 50minutes......

*EDIT 2*
DAMN!!! AVIDEMUX failed to ASPECT RATIO and i have correctly setted!!
Otherwise AVIDEMUX fail to encode audio track............... every 10 seconds in audio tracks has been inserted a clip like missing part or distortion!!

At this point i don't know another programs for coverting the source MPEG file...........

Now....... from this i need to CUTTED some parts............... i have search over internet...... i thinks the best choice it's using Avidemux.
Yeah...... i have downloaded the latest official 2.6.8 and installed on a Windows 8.1...................... i have selected copy for audio and video...... cutted useless parts........... and......................... I CAN'T SAVE THIS SELECTION!